/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
/************************************************************************************************
 * PRODUCT OF PT INOVACAO - EST DEPARTMENT and Telecommunications Institute (Aveiro, Portugal)  *
 ************************************************************************************************/


package gov.nist.javax.sip.parser.ims;

/**
 * Privacy header parser.
 *
 * @author Miguel Freitas (IT) PT-Inovacao
 */

/*
 * Privacy-hdr  =  "Privacy" HCOLON priv-value *(";" priv-value)
 * priv-value   =   "header" / "session" / "user" / "none" / "critical" / token
 */

import gov.nist.core.*;
import gov.nist.javax.sip.header.SIPHeader;
import gov.nist.javax.sip.parser.Lexer;
import gov.nist.javax.sip.parser.TokenTypes;
import gov.nist.javax.sip.parser.HeaderParser;

import java.text.ParseException;

import gov.nist.javax.sip.header.ims.Privacy;
import gov.nist.javax.sip.header.ims.PrivacyList;
import gov.nist.javax.sip.header.ims.SIPHeaderNamesIms;



public class PrivacyParser 
	extends HeaderParser
	implements TokenTypes
{

	
	public PrivacyParser(String privacyType) {
		
		super(privacyType);
	}
	
	protected PrivacyParser(Lexer lexer) {
		
		super(lexer);
	}
	

	public SIPHeader parse() throws ParseException
	{
		if (debug)
			dbg_enter("PrivacyParser.parse");

		PrivacyList privacyList = new PrivacyList();
		
		try 
		{
			this.headerName(TokenTypes.PRIVACY);
			
			while (lexer.lookAhead(0) != '\n') {
				this.lexer.SPorHT();
				
				Privacy privacy = new Privacy();
				privacy.setHeaderName(SIPHeaderNamesIms.PRIVACY);

				this.lexer.match(TokenTypes.ID);
				Token token = lexer.getNextToken();
				privacy.setPrivacy(token.getTokenValue());
				this.lexer.SPorHT();
				privacyList.add(privacy);
				
				// Parsing others option-tags
				while (lexer.lookAhead(0) == ';') 
				{
					this.lexer.match(';');
					this.lexer.SPorHT();
					privacy = new Privacy();
					this.lexer.match(TokenTypes.ID);
					token = lexer.getNextToken();
					privacy.setPrivacy(token.getTokenValue());
					this.lexer.SPorHT();

					privacyList.add(privacy);
				}
			}
			
			return privacyList;
			
		}
		finally {
			if (debug)
				dbg_leave("PrivacyParser.parse");
		}
	
	}

	
	/** Test program */
    public static void main(String args[]) throws ParseException
    {
		String rou[] = {
				
			    "Privacy: none\n", 
			    "Privacy: none;id;user\n"
			};
			
		for (int i = 0; i < rou.length; i++ ) {
		    PrivacyParser rp = 
			  new PrivacyParser(rou[i]);
		    PrivacyList list = (PrivacyList) rp.parse();
		    System.out.println("encoded = " +list.encode());
		}
    }
	
	
	
}

